Request: Each island its own biome

Hello! I'm looking for a generator preset that spawns small - medium islands / 'continents', each with their own biome. I can get pretty close with river and biome size set to 2 but it feels like something's missing.

Also, is there a way to get more flat beaches / river transitions? Kind of like in the early beta / late alpha days. By default, most land 'caves in' near rivers and takes away from the island feeling.